java.netConnectException error when connecting to iSeries with IFSFileInputStream

I have a simple Java program (using JTOpen) to connect to an iSeries 开发者_开发技巧and open a IFS file:

System.out.println("by ipaddress");
AS400 as400 = new AS400("130.3.3.333", "user", "password");
System.out.println("as400 connected? = " + as400.getCcsid());
//handle the exception if the file is null 
IFSFileInputStream as400File = new IFSFileInputStream(as400, "//PDF//00000104.PDF");
System.out.println("is available" + as400File.getPath());
as400File.close();

On one server in DMZ everything works fine but on a (supposedly identical) VM image on a server in a different building (still in DMZ) I get an error:

by ipaddress
as400 connected? = 37
IO security exception
java.net.ConnectException: Connection timed out: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.<init>(Unknown Source)
    at java.net.Socket.<init>(Unknown Source)
    at com.ibm.as400.access.PortMapper.getServerSocket(PortMapper.java:170)
    at com.ibm.as400.access.AS400ImplRemote.getConnection(AS400ImplRemote.ja
va:975)
    at com.ibm.as400.access.AS400ImplRemote.connect(AS400ImplRemote.java:390
)
    at com.ibm.as400.access.AS400.connectService(AS400.java:870)
    at com.ibm.as400.access.IFSFileInputStream.connectAndOpen(IFSFileInputSt
ream.java:416)
    at com.ibm.as400.access.IFSFileInputStream.<init>(IFSFileInputStream.jav
a:150)
    at com.ibm.as400.access.IFSFileInputStream.<init>(IFSFileInputStream.jav

The connection works fine but then get a connect exception.

Any ideas welcome. Same ports are open in the firewall between both servers to the iSeries.

There are multiple services each on their individual port and the initial connect only opens one. Check the jt400 faq for the file service. I expect this port to be unopened in the firewall.